Search results
Results from the WOW.Com Content Network
Therefore, when concreting at cold temperature cannot be avoided, it is essential to have a minimum curing time at a temperature sufficiently above the freezing point of the concrete pore water, so that the early strength of concrete is high enough to resist the inner tensile stress caused by water freezing. [5]
"Freeze-Thaw resistance". Polymers in Concrete. CRC Press. pp. 40–42. ISBN 9780849348150. J. Marchand; Michel Pigeon; M. Setzer (1997). Freeze–thaw Durability of Concrete. Proceedings of the International Workshop in the Resistance of Concrete to Scaling Due to Freezing in the Presence of De-icing Salts, Sainte-Foy, Québec, Canada.
These are created during concrete mixing (while the slurry is in its liquid state), with most surviving to remain part of it when hardened. Air entrainment makes concrete more workable [1] during placement, and increases its durability when hardened, particularly in climates subject to freeze-thaw cycles. [2] It also improves the workability of ...
As these properties affect the hardened compressive strength and durability of concrete (resistance to freeze-thaw), the properties of workability (slump/flow), temperature, density and age are monitored to ensure the production and placement of 'quality' concrete.
Concrete fracture. Freeze-thaw cycles of composite materials can weaken them. [18] Moisture within composite materials has been modeled to try and predict the effects of water freezing with composite materials. [19] As a widely used composite material, concrete is also an important material susceptible to freeze-fracture. [20]
Freezing rain does not bounce when it hits the ground like sleet, and it does not run off as warm rain does. Due to its resemblance to ordinary rain, its onset may catch some off-guard until it ...
Photograph taken 21 March 2010 in Norwich, Vermont. Frost heaving (or a frost heave) is an upwards swelling of soil during freezing conditions caused by an increasing presence of ice as it grows towards the surface, upwards from the depth in the soil where freezing temperatures have penetrated into the soil (the freezing front or freezing boundary).
A winter storm emerging from the Rockies is forecast to bring rain, snow and ice to a large part of the U.S., the National Weather Service said Friday, bringing below freezing temperatures with it ...